netdev - [PATCH 4/4] hv_netvsc: Pass net_device parameter to revoke and teardown functions

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Date:   Thu,  5 Apr 2018 21:09:21 +0200
From:   Mohammed Gamal <mgamal@...hat.com>
To:     netdev@...r.kernel.org, sthemmin@...rosoft.com
Cc:     devel@...uxdriverproject.org, linux-kernel@...r.kernel.org,
        kys@...rosoft.com, haiyangz@...rosoft.com, vkuznets@...hat.com,
        otubo@...hat.com, Mohammed Gamal <mgamal@...hat.com>
Subject: [PATCH 4/4] hv_netvsc: Pass net_device parameter to revoke and teardown functions

The callers to netvsc_revoke_*_buf() and netvsc_teardown_*_gpadl()
already have their net_device instances. Pass them as a paramaeter to
the function instead of obtaining them from netvsc_device struct
everytime

Signed-off-by: Mohammed Gamal <mgamal@...hat.com>
---
 drivers/net/hyperv/netvsc.c | 37 ++++++++++++++++++-------------------
 1 file changed, 18 insertions(+), 19 deletions(-)

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index df92c2f..04f611e 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -110,9 +110,9 @@ static void free_netvsc_device_rcu(struct netvsc_device *nvdev)
 }
 
 static void netvsc_revoke_recv_buf(struct hv_device *device,
-				   struct netvsc_device *net_device)
+				   struct netvsc_device *net_device,
+				   struct net_device *ndev)
 {
-	struct net_device *ndev = hv_get_drvdata(device);
 	struct nvsp_message *revoke_packet;
 	int ret;
 
@@ -160,9 +160,9 @@ static void netvsc_revoke_recv_buf(struct hv_device *device,
 }
 
 static void netvsc_revoke_send_buf(struct hv_device *device,
-				   struct netvsc_device *net_device)
+				   struct netvsc_device *net_device,
+				   struct net_device *ndev)
 {
-	struct net_device *ndev = hv_get_drvdata(device);
 	struct nvsp_message *revoke_packet;
 	int ret;
 
@@ -211,9 +211,9 @@ static void netvsc_revoke_send_buf(struct hv_device *device,
 }
 
 static void netvsc_teardown_recv_gpadl(struct hv_device *device,
-				       struct netvsc_device *net_device)
+				       struct netvsc_device *net_device,
+				       struct net_device *ndev)
 {
-	struct net_device *ndev = hv_get_drvdata(device);
 	int ret;
 
 	if (net_device->recv_buf_gpadl_handle) {
@@ -233,9 +233,9 @@ static void netvsc_teardown_recv_gpadl(struct hv_device *device,
 }
 
 static void netvsc_teardown_send_gpadl(struct hv_device *device,
-				       struct netvsc_device *net_device)
+				       struct netvsc_device *net_device,
+				       struct net_device *ndev)
 {
-	struct net_device *ndev = hv_get_drvdata(device);
 	int ret;
 
 	if (net_device->send_buf_gpadl_handle) {
@@ -452,10 +452,10 @@ static int netvsc_init_buf(struct hv_device *device,
 	goto exit;
 
 cleanup:
-	netvsc_revoke_recv_buf(device, net_device);
-	netvsc_revoke_send_buf(device, net_device);
-	netvsc_teardown_recv_gpadl(device, net_device);
-	netvsc_teardown_send_gpadl(device, net_device);
+	netvsc_revoke_recv_buf(device, net_device, ndev);
+	netvsc_revoke_send_buf(device, net_device, ndev);
+	netvsc_teardown_recv_gpadl(device, net_device, ndev);
+	netvsc_teardown_send_gpadl(device, net_device, ndev);
 
 exit:
 	return ret;
@@ -474,7 +474,6 @@ static int negotiate_nvsp_ver(struct hv_device *device,
 	init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT;
 	init_packet->msg.init_msg.init.min_protocol_ver = nvsp_ver;
 	init_packet->msg.init_msg.init.max_protocol_ver = nvsp_ver;
-
 	trace_nvsp_send(ndev, init_packet);
 
 	/* Send the init request */
@@ -596,13 +595,13 @@ void netvsc_device_remove(struct hv_device *device)
 	 * Revoke receive buffer. If host is pre-Win2016 then tear down
 	 * receive buffer GPADL. Do the same for send buffer.
 	 */
-	netvsc_revoke_recv_buf(device, net_device);
+	netvsc_revoke_recv_buf(device, net_device, ndev);
 	if (vmbus_proto_version < VERSION_WIN10)
-		netvsc_teardown_recv_gpadl(device, net_device);
+		netvsc_teardown_recv_gpadl(device, net_device, ndev);
 
-	netvsc_revoke_send_buf(device, net_device);
+	netvsc_revoke_send_buf(device, net_device, ndev);
 	if (vmbus_proto_version < VERSION_WIN10)
-		netvsc_teardown_send_gpadl(device, net_device);
+		netvsc_teardown_send_gpadl(device, net_device, ndev);
 
 	RCU_INIT_POINTER(net_device_ctx->nvdev, NULL);
 
@@ -624,8 +623,8 @@ void netvsc_device_remove(struct hv_device *device)
 	 * here after VMBus is closed.
 	*/
 	if (vmbus_proto_version >= VERSION_WIN10) {
-		netvsc_teardown_recv_gpadl(device, net_device);
-		netvsc_teardown_send_gpadl(device, net_device);
+		netvsc_teardown_recv_gpadl(device, net_device, ndev);
+		netvsc_teardown_send_gpadl(device, net_device, ndev);
 	}
 
 	/* Release all resources */
-- 
1.8.3.1